Telephone desk-stand.



No. 884,500. 888888807 A818a 18, 1808.

A. Ms 818008808. TELEPHONE DESK STAND,

APPLICATIN FILED SEPT. 2', 1904.

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TELEPHONE DESK STANDe APPLICATION FILED SH12. 1904.

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y T0. all whom. 'it may concern.'

UNITED sTATEs PATENT oEErcE.

ANTON M. KNUDSEN, OF CHICAGO, ILLINOIS, ASSIGNOR TO KELLOGG SWITCHBOARD 'da SUP- RLY COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF lLLINOIS.

TELEPHONE DESK-STAND.

Application led September 2, 1904. Serial No. 223,111.

Be it known that I, AtN'roN M. KNUDsEN, a citizen of the United States, residing at (lhicago, in the county of (look and State of llli nois,A have invented certain new and useful Improvements in rlelephone Desk -Stands,

of which the following is a specification.

My invention relates to improvements in the construction of telephone desk stands, by means of which a lighter and stronger instrument may be produced and by which a more 'satisfactory and eiiicient type of instrument throughout is provided. In instruments of this class the base usually consists of cast iron, but this to be suliciently strong and in some types oi instruments sufficiently large, makes the basevery heavy and consequently the instrument is unwieldy.

One object of my invention is to lighten and at the same time strengthen the base and cheapen its construction. This I accomplish 1n one practical manner by pressing or spinning the base from sheet metal an ,suitably bracing the same and providing it with means upon which to mount the various parts required to be placed within the base. Other objects are to improve the hook switch mechanism and various other details of the instrument.

My invention is illustrated in the accom-v anying 'drawing in which the same reference. etters. are used throughout lthe several views to designate like parts' and in which:

Figurel is a sectional View of a desk stand embodying my improvements; Fig. .2 is a cross section on the line 2-2 of Fig. 1 and looking toward the head of the stand; Fig. 3 is adetail-perspective view of the binding posts; Fig. 4 isa detail view of the lower part of the switch hook; Fig. 5 is a perspective view of the clamping plate for the switch springs; Fig. 6 is a similar view of the projecting end oi a spring of the set of switch springs Fig. 7 is a bottom plan view of the stand rangement of the switch springs.

The desk stand includes a suitable'lpedestal having a base 2 and a standard 3. he base 42 consists of an outer vmetallic shell'4 of sheet metal pressed or spun into ,the desired form, and a circular plate 5 which may be termed 'a subbase placed Within the said shell 4- and forming a bracing medium therefor, as well as a mountlng `for the various parts lo- Specication of Letter-s Patent'.

Patented April 14, 1908.

cated within the base. This subbase is also of sheet metal and is provided with a central depression 6 which is also stamped or spun therein, said depression providing room for a circular nut 7 which is threaded upon the lower end of the metallic tube 8 forming the standard of the instrument. A collar or .tube 8EL is placed between the depressed portion of the plate 5 and the inner side of the shell 4 and forms a supporting medium between said plate or subbase and the said shell. A ring or nut 9 is threaded upon said tube 8 and forms an abutment for said shell 4. The subbase is adapted to rest at its periphery upon the inside of the base 4 and when the nut 7 is tightened said subbase and shell 4 are clamped firmly together and to the standard 3, and it is obvious that when the nut 7 is removed, the sub-base 5 and its associated arts may be removed from the base -orshelli 4 as a'unit. As hereinafter explained, the switch springs of the desk stand and the various other parts used therewith, are mounted upon said subbase within the inclosure formed bythe shell 4. In order to close said inclosure suitable depending posts 10 are riveted or otherwise secured at their upper ends to said subbase 5 and'at their lower `ends receive screws( 11 extending throu h the bottom plate 12 which serves when c amped in position to close thev opening in base 4. Projec-l tions 12a formed at intervals in the plate 12 engage the inner edge of the periphery of the base 4 and serve to centrally locate the late and stiften the base. A covering 13v oi) felt or other suitable material is glued to the loWer face of the bottomA plate to prevent the stand from scratching the surface of the desk.v

or other article upon which it is placed. Provision is made for preventing the screws 11 from scratching the surface upon which the set may pressionsv formed in said plate 12.

The head ieee of the standard consists of a casting 15 iiaving a ange 16 tting outside of the upper end of said tube 8 and secured be .placed by means of the de thereto by 'means of one or more screws 17.

At the u per end of this head the usual hinge is provided to receive the corresponding part of the transmitter with which the stand is rovided, the nut-18 as in common practice ein provided to secure the pivot screw of said inge in lace and to increase or decrease the frlctionl etween the hmgmg members.

- end of said part 19.

This head piece is provided with a central depending portion 19 provided with an aperture 2() through which the transmitter cords are adapted to pass from the transmitter through the hinging members and to the inside of the tubular standard, by which means they are concealed throughout their length. These transmitter cords or conduetors are indicated at 21 and at the lower end of said portion 19 pass toward the rear through a slot formed therein Jand are held in their proper positions by notches 22 formed in a semi-circular plate 23.v secured by screws 24 to the lower The switch hook consisting of an outwardly-extending arm 25 provided with a hook 26 for the reception of the telephonereceiver, is pivoted in a vertical slot formed in the lower end of the part 19 and upon a pivot pin 27 which rests in notches in the lower end ot said part 1.9 and is supported and secured in position in said notches bythe plate 23. The upper end of the tube 8 is slotted for the passage of vsaid arm 25 of the switch hook and the coperating slot or notch is formed in the lower edge of the flange 16 ot the head 15. The portion 25 of the hook switch is preferably formed of two members placed 'face to vface and riveted together as indicated in Fig. 2 and the downwardly-extending arm 28, which is a rigid member, consists preferably ol a single member riveted between the downwardly-turned ends of the two members forming the arm 2.5, this being indicated at 2). A stop lug 3() is formed upon the rear edge ot the lower end of the arm 28 and engages the inside ot' the tube 8 when the receiver is lullig upon lthe hook.

To the lower end of the arm 28 the bar or rod 31 is pivoted, said bar consisting also ol' two members placed tace to face and riveted together as indicated in Fig. 4 and carries at its lower end the insulating roller 32 which is provided with an insulating washer 353 at each end. This insulatingl roller is adapted to engage the forwardly-extemling upturned free end 34 of the switchspring which lorms the operating member of the set ol' springs located and secured within the base 2. When the receiver is placed upon the hook '2o therefore, the arms 2S and 251 ol' the switch hook, which together form a toggle lever. are Operated and the spring -'i is depressed. l/Vhen the receiver is removed trom the hook 26 the tension oi' the spring 34 is sullicient to move the switch hook into the position shown in full lines. The dotted lines are intended to show the normal depressed position ot' said parts. The stop t) limits the movement of the arm 28 and prevents the toggle connection from locking the springs in their depressed position. The said springs are clamped to a plate 255 shown in Fig. 5 b v means of suitable screws 36, said springs being insulated from said plate by a suitable insulating block 37 and from eachother and from the screws 36 by suitable insulating strips and bushings in the usual manner. The clamping plate 35 is secured to the subbase 5 by means of the screws 3S. The forward end ol this plate. is provided with the laterallycurved tongues 39 beneath which the transmitter cords 21 pass and by means of which they are clamped into position at their lower ends, thus preventing them from interfering in any manner with the operation of the switch hook. The plate 35, therefore, serves as a clamping means for the transmitter cords and as a supporting medium for the switch springs.

The binding posts which I prefer to use in connection with this desk stand are more clearly shown in Fig. 3 and Fig. 7 and which consist of a U-shaped metal strip 40 fitting over a suitable insulating strip or block 41 secured by the screws 42 to the lower face of said subbase An aperture 43 extends transversely through the vertical members ol said U-shaped plate 4t) to receive the tips ot' the cord terminals 44 and the binding screw 45, threading through said plate 40 serving as a means to clamp the said tip in place. A projection 46 formed integrally with said member 4t) serves as a means for soldering the connecting wires thereto. When the receiver cord or other tips 44 are in place the screws 45 provide a secure mechanical and electrical connection between the same and'the said binding posts.

As shown in Fig. 7, the screws 42 are provided with the hooked washers 47 to which the supporting cords 48 of the receiver and line cords may be secured to take the strain oll the conductors ot said cords. springs are provided with suitable lateral projections 4t) b v means ot` which they may be soldered to the conductors of the electric-al circuits.

'lhe particular arrangement of binding posts and switch springs which l have shown and described thus lar is 'l'or so-ealled common battery telephone s vstems in which a central source ot' current is provided tor the operation ol' the substation transmitters.` In the circuit in which this instrument is shown connected, the diagram oi' which is illustrated in Fig. el, a retardation coil 50 is provided and which is secured tothe subbasey 5 by means of an extended portion 51 formed upon one of its end pieces together with the screw 52 threading therethrough and into the subbase. A small condenser 53% is also provided in the base ol' this set and is held in position therein by the lugs 54 which may be formed therein at the same time thatthe depression 6 is made in the subbase, and b v the clamp ing strip 55 also secured to the subbase by the screw .36. l have not shown all of the conductors in Fig 7 to connect thel binding ,The switchv seguo@ between the desk stand and the usual bell box 59, a central source of current 60 being suitably connected withl the telephone line at the central oflice to provide current for talking purposes.

In Fig. 9 I show an arrangement of switch springs adapted Jfor local battery work or systems in which the battery for talking `is located Iat the substation and which arrangement requires a greater number of springs. These additional switch springs are shown and it will beunderstood that their number may be increased or varied to suit the requirements of any particular system, whether of local battery or common battery, and it will also be understood that the sub-base 5 may be removed and a sub-base substituted having mounted thereon apparatus suitable lor a different system, as, for instance, if it is desired to change from a common battery to a.

local battery or to a magneto system the other parts of the stand remaining the same.

The special arrangement of the switch hook is of advantage' in this type of desk stand for the reason that as the movement and the tension of the switch springs increases the power developed by the toggle levers also increases and an extra heavy receiver is not required to operate the same. Again, this arrangement of the switch hook produces a larger movement of the free ends of the springs than is possible in the ordinary instrument where a single elbow lever is emloyed as a switch hook unless an unduly iieavy receiver be provided.

It is apparent that various changes may be made in the details of my improvements without departing from the intended scope or spirit of the invention, and I accordingly do not wish to be limited in all respects and claims to those described herein, but

What I do claimand desire tc secure by Letters Patent is:

1. In a desk stand, the combination with hollow standard land a thin metal base, of a transmitter and switch-hook carried at the` upper end of said standard, a vmetal plate secured horizontally within said base, switch springs carried by said plate and adapted .to

be actuated by a movable member within said hollow standard, terminal conductors leading downward from the transmitter, said plate having an aperture directly beneath the .4 o ening in the hollow standard through w ich lsaid'terminal conductors and movable member pass, substantially as described.

y 2.' In a vdesk stand, the combination with a hollow standard and a thin metal base, of an interior reinforcing base securedin position by attachment to the lower end of the standard, substantially as described.

3. In a desk stand', the combination with a hollow standard and a thin metal supporting base, of an .interior base having an aperture through which the lower end of said standard extends, said base providing means to secure apparatus within the base without marring the exterior surface of the outer base, substantially as described.

4. A desk stand, having va base and a standard mounted thereon, said base having an outer shell of comparatively thin metal, a plate or subbase within the shell extending across the same and bearing against theinside vof the shell at its periphery, and means including the standard to clamp said plate within and to the described. Y,

5. A desk stand, having a base and a standard mounted on the base, said base comprising an outer shell of sheet metal spun or pressed to the desired form, a central aperture in said shell, a plate extending across the shell and having a central aperture, said plate bearing at its periphery against the-inside of the shell, and means extending through said apertures to clamp said shell and plate together, substantially as described.v

6; A desk stand, having a base and a standard mounted on the base, said base comprising an outer shell, an inner subbase formed from a plate resting at its periphery upon the inner face of said shell, and means including the standard to clamp the said plate within'and to the shell, substantially as described. l

7. A desk stand, having a base and a standard mounted on the base, said base comprising an outer shell, an inner subbase formed from a plate resting at itsperiphery shell, substantially as upon the inner face of said shell, said shell Outsi( e of the said shell, and a threaded nut adapted to screw upon the lower end of the standard beneath the said plate whereby the said plate and shell may be clamped together, substantially as described.

8. A desk stand, consisting of a base and a suitable standard mounted on the base, said base comprising an outer shell of sheet metal pressed or spun into the desired form and having a raised central portion, a subbase consisting of a circular disk resting at its periphery upon the inside of said shell and extending across inside the same, said shell and said disk having central apertures through which the tube forming the standard is adapted to extend, a shoulder provided upon said tube which rests against the outside of said shell, a nut threade'd upon the lower end of said tube beneath the said pwte, a sleeve or collar surrounding said tube between the plate and shell and serving to properly space the same apart, whereby when the nut is tightened the disk and shell 'are firmly clamped together to form a rigid structure, substantially as described.

9. ln a telephone desk stand, the combination with a hollow base, of a suitable standard mounted thereon, a plate detachably mounted wholly within said base, said plate having a central aperture therein whereby access may be had to the interior of the standard without removing the plate, 'and having contact springs carried by said plate adapted to make and break the circuit of the device, said plate and its associate parts being readily removable therefrom as a unit, 'and a suitable hook switch mechanism for operating said springs, substantially as described. A

'10. In a telephone desk stand, the combination with a hollow base, of a suitable standard mounted thereon, a subbase detachably secured within said hollow base, said subbase having an aperture therein allowing access to the interior of the standard, and having mounted thereon'the operative parts of the stand a cover for the base removable to inspect said parts, and said subbase being readily removable as a unit, whereby the repair of said parts -is greatly facilitated, substantially as described.

11. In a telephone desk stand, the combination with a base, of a suitable standard mounted thereon, said base comprising an outer shell, and a sub-base having mounted thereon the operative arts of the stand disposed within said shell said base having an aperture therein through which a repair man may have access to the interior of the standard, said sub-base and its associate parts being readily removable therefrom as a unit, substantially as described.

12. In a desk stand, the combination with a thin metal exterior base, of an interior thin metal base, said bases having apertures through the central portions thereof, a hollow standard extending through said apertures, said interior base engaging the outer base at oints near the periphery of the exterior ase, means for securing the two bases together, whereby the interior base willbe slightly sprung out of its normal shape when' the two bases are in position, thereby forming a rigid structure, substantially as described.

13. In a desk stand, the combination with a hollow standard and a thin metal base, of an interior base tightly held in contact with the exterior base by attachment to the lower end of the standard, said interior base reinforcing the outer base and roviding means for securing apparatus in tie base without nzarring the external surface of the outer base, substantially as described.

14. ln a telephone desk stand, the combination with a tubular standard and a hollow base, of transmitter cords or conductors assing down through the said hollow stan( ard, binding posts provided for said cords, a plate secured within the base having laterally-extending tongues to clamp the transmitter cords in osition at the lower end of the tubular stan( ard, yand a set of switch springs also mounted upon said plate, substantially as described. 15. In a desk stand, the combination with a hollow standard and a thin metal base, of a second base within the outside base having an aperture therein through 'which the standard extends, and a nut threaded upon the standard to hold the inner base securely against the outer base, substantially as described.

16. In a desk stand, the combination with a standard, of exterior and interior bases, each having an aperture therein through which the standard extends,xa shoulder upon the standard against which the outer base abuts, and nzeans secured upon the lower end of the standard and abutting the lower side of the inner base, said means being adapted to hold the two bases securely together, where` by a rigid structure is obtained, substantially as described.

In witness whereof, I hereunto subscribe my name in the presence of two witnesses.

ANTON M. KNUDSEN.

Witnesses ROBERT LEWIS Aims, A Eni'rn F. Grunn. 

